Hi, my 10 year old Frankie was diagnosed with diabetes a month ago & the vet wants to prescribe Prozinc. I am trying to get him started on insulin, unfortunately right after he was diagnosed I had to go out of state to take care of my mom as she recovered from a double mastectomy so I wasn’t able to get Frankie on insulin right away. I immediately switched him to a low carb high protein wet diet-fancy feast pate and Wellness Pate. I am wondering how long a 10ML vial of prozinc should last? I know that dosing varies, so I guess if Frankie starts out at the highest dose, how long 1 vial might last him? How many vials a month would he need? Would 1 vial last 2-3 months?And pricing, my vet charges $140 for a vial but I see I can get it for around $108 on chewy.com. Is it possible to get it cheaper than that? I do not know what dosage the vet wants to put Frank on, since it’s been a month since his diagnosis the vet wants me to bring him in to have his blood sugar checked before she will do an insulin demo and give me the insulin. I am totally committed to this, only issue is a husband who doesn’t want to spend the money Thank you all so much.